/**
 * #      668
 * 名称   乘法表中第k小的数
 * 链接   https://leetcode-cn.com/problems/kth-smallest-number-in-multiplication-table
 * 题解   [52](https://leetcode-cn.com/problems/kth-smallest-number-in-multiplication-table/solution)
 * 通过率 49.6%
 * 难道   困难
 */

